package com.itheima.stock.helper;


import com.google.common.util.concurrent.RateLimiter;
import com.itheima.stock.enums.CodeEnum;
import com.itheima.stock.response.ResponseResult;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Aspect
@Component
public class LimiterAspect {

    @Autowired
    private RateLimiter rateLimiter;

    @Pointcut(value = "@annotation(com.itheima.stock.annotation.Limiter)")
    public  void  pt(){}


    @Around(value = "pt()")
    public  Object limit(ProceedingJoinPoint pjp) throws  Throwable{

        boolean flag = rateLimiter.tryAcquire();
        if (flag){
            return  pjp.proceed();
        }else {
            return  ResponseResult.error(CodeEnum. OVER_CONCURRENT_NUM);

        }


    }

}
